Default sort order per column

[mootari]

It is often desirable to sort numeric or date columns in descending order, viewing the highest or latest items first. In the Table input, this can only be achieved by clicking the respective column twice.

Suggested solution

1. Allow the option reverse to be specified per column.
2. When clicking a column header, query this setting to determine the column's initial sort order.

[Fil]

see #76

[mootari]

I'm not sure that #76 replaces the need for this issue. It only implements an alt-modifier for the clicks, but:

1. The modifier key isn't documented anywhere (as far as I'm aware)
2. Even if it were, viewers can't be expected to know about it
3. It still requires mental switching when sorting different types of columns.

[jrus]

Clicking twice seems like a pretty trivial burden (this is standard behavior from many other sortable table implementations), and consistency from table to table seems like a benefit to readers. I'd skip this change.